An automated warehouse delivery rover is moving along a straight horizontal track. The rover has a mass of 125 kg125\text{ kg}125 kg. To avoid an obstacle, its braking system is engaged, producing a constant deceleration of 1.2 m/s21.2\text{ m/s}^21.2 m/s2.
Calculate the time taken for the velocity of the rover to decrease from 6.4 m/s6.4\text{ m/s}6.4 m/s to 1.6 m/s1.6\text{ m/s}1.6 m/s.
Determine the magnitude of the horizontal resultant braking force acting on the rover.